P
US6806714B2ExpiredUtilityPatentIndex 57

Detector of near-infrared light

Assignee: PRESIDENT OF TOKYO UNIVERSITYPriority: Jan 20, 2003Filed: Mar 24, 2003Granted: Oct 19, 2004
Est. expiryJan 20, 2023(expired)· nominal 20-yr term from priority
Inventors:IZUMI MITSURUYANAGISAWA OSAMINAKAYAMA TAKAHIROARAI MASATO
C01G 37/003C01P 2002/72C04B 2235/768C04B 35/6262C04B 2235/3227G01J 1/42C04B 35/42C04B 2235/3224C01P 2002/34C01G 37/033C01P 2006/42
57
PatentIndex Score
2
Cited by
11
References
7
Claims

Abstract

A detector of near-infrared light includes a light receiving device having a perovskite-type composite oxide expressed by a general formula of La 1-x Pr x CrO 3 (where 0<x<1) and magnetization measuring means for measuring an increase in magnetization in the composite oxide of the light receiving device when the light receiving device is irradiated with near-infrared light at room temperature.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
       1. A detector of near-infrared light, the detector comprising; 
       a light receiving device having a perovskite-type composite oxide expressed by a general formula La 1-x Pr x CrO 3  (where 0<x<1); and  
       magnetization measuring means for measuring an increase in magnetization in the composite oxide of the light receiving device when the light receiving device is irradiated with near-infrared light at room temperature.  
     
     
       2. The detector of near-infrared light according to  claim 1 , wherein x in the general formula is 0.5 or less. 
     
     
       3. The detector of near-infrared light according to  claim 1 , wherein x in the general formula ranges from 0.05 to 0.3. 
     
     
       4. The detector of near-infrared light according to  claim 1 , wherein the light receiving device is a transparent capsule in which a powder of the perovskite-type composite oxide expressed by the general formula is enclosed. 
     
     
       5. The detector of near-infrared light according to  claim 1 , wherein the light receiving device is a thin film made of the perovskite-type composite oxide formed on a substrate. 
     
     
       6. The detector of near-infrared light according to  claim 1 , wherein the magnetization measuring means is an electron spin resonance measurement instrument having magnetic-field applying means for applying a magnetic field to the light receiving device and sweeping it. 
     
     
       7. The detector of near-infrared light according to  claim 1 , wherein the magnetization measuring means is an AC inductance coil for measuring an increase in magnetization of the light receiving device.

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